Sams Teach Yourself C in 21 Days

Answers 861

F

int var = 99;

void print_func(void);

int main( void )

{

int var = 77;

printf( “Printing in function with local and global:”);

printf( “\nThe Value of var is %d”, var );

print_func( );

return 0;

}

void print_func( void )

{

printf( “\nPrinting in function only global:”);

printf( “\nThe value of var is %d\n”, var );

}

6. There is only one problem with a_sample_function(). Variables can be declared
   at the beginning of any block, so the declarations of crtlandstarare fine. The
   other variable,ctr2, is not declared at the beginning of a block; it needs to be. The
   following is the corrected function within a complete program.
   Note: If you’re using a C++ compiler instead of a C compiler, the listing with a
   bug might run and compile. C++ has different rules concerning where variables
   can be declared. However, you should still follow the rules for C, even if your
   compiler lets you get away with something different.
   #include <stdio.h>
   void a_sample_function( );
   int main( void )
   {
   a_sample_function();
   return 0;
   }
   void a_sample_function( void )
   {
   int ctr1;

for ( ctr1 = 0; ctr1 < 25; ctr1++ )

printf( “*” );

puts( “\nThis is a sample function” );

{

char star = ‘*’;

int ctr2; /* fix */

puts( “\nIt has a problem\n” );

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